As of July 2026, Shadowhunters Season 3 aired in 2018 with 22 episodes — streaming now on Hulu. Full episode guide and where to watch below.

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Shadowhunters Season 3

2018 22 Episodes Action & Adventure · Drama ⭐ 8/10

Right now you can watch Shadowhunters Season 3 on — and it goes further with its ideas than most genre entertainment bothers to. The show says what it needs to say in a single season, no filler. With 1,230 viewer ratings on TMDB, this is not a title flying under the radar. Katherine McNamara leads a cast that never lets the concept overwhelm the characters. Put it on tonight and see for yourself.

Part of the current wave of titles people are actually watching, Shadowhunters Season 3 earns its spot. Shadowhunters Season 3 treats its concept seriously enough to follow it all the way through. While the Shadowhunters deal with changes in their personal lives and Clary and Jace keep dark secrets, a serious threat to the Shadowhunters emerges in the form of Lilith, a powerful demon building an army of disciples on a quest to resurrect her "precious boy" Jonathan. Katherine McNamara and Dominic Sherwood lead a cast that brings real weight to the material. It was aired in 2018. What separates Shadowhunters Season 3 from lesser genre entertainment is a willingness to let the concept cost the characters something. The consistency throughout is what elevates it — not every moment is the best, but none of them are a reason to stop watching.

Shadowhunters Season 3 is satisfying on multiple levels — something to watch and something to think about after. It has built its own audience without needing a direct comparison. The complete run is available and best experienced without too much prior knowledge of where it goes. Watch for Katherine McNamara in particular — the performance elevates the material. Satisfying on multiple levels.

📡 Where to Watch Shadowhunters Season 3

🇺🇸 United States

🎬 Shadowhunters Season 3 — Episode Guide

On Infernal Ground

Secrets abound as the Shadowhunters and Downworlders try to get back to normal after Valentine's death. Clary struggles with keeping her secret about Raziel's wish, while Alec pushes Jace to come clean about whatever Jace and Clary are hiding. Luke must use tough love to keep his secret hidden from ...

The Powers That Be

The Warlocks’ magic is becoming corrupted by a demonic presence while Izzy and Luke try to track down more information on the recent series of possessions.

What Lies Beneath

The Shadowhunters try to track down the new imposing threat, while Jace has a suspicion that Jonathan is back and behind the mundane attacks. Simon tries to figure out what The Seelie Queen did to him during his time in the glade. Alec decides to host a Lightwood family dinner at Magnus’ house after...

Thy Soul Instructed

Jace’s concerns grow about his mental state and turns to Luke for information on his family’s past. Clary and Izzy go after a rogue vampire and Simon hunts for a new apartment.

Stronger Than Heaven

Someone is out to get Simon and Jace is on the hunt to find out who it is, meanwhile Clary turns to Luke to find a way to help Jace. Alec worries about the future of his relationship after learning more about Magnus’ romantic past.

A Window into an Empty Room

Clary teams up with Magnus to investigate a recent demon attack. Simon is stunned with he’s visited by someone he never thought he’d see again, and who now won’t seem to leave. Meanwhile, Izzy worries about dinner with her family and a special guest and Luke reaches out to Maryse.

Salt In the Wound

With the Owl's identity revealed, Alec, Isabelle, and Clary head to Alicante to try and find a way to stop him. Luke and Simon team up to track Lilith's latest possible victim. Maia reflects on her past.

A Heart of Darkness

Magnus, Alec and Isabelle try to reach Jace inside The Owl, but even as powerful as Magnus is, can he help the Lightwoods retrieve their brother from his demon prison? Maia and Jordan join Simon on the hunt for Lilith, while Luke tries to find a way to get to Clary.

Familia Ante Omnia

Clary faces down an old foe in an attempt to find answers about Lilith’s plan. Alec and Magnus turn to Lorenzo Rey for help, while Lilith finds a new ally. Luke must choose between his pack and his family, as Simon is forced to deal with his past.

In the climactic mid-season finale, the team scrambles to find a way to put a stop to Lilith’s plan coming to fruition. But going up against their biggest opponent yet, their odds are not looking good. Meanwhile, Simon makes a heartbreaking choice with Isabelle’s help and Magnus reconnects with a po...

With the loss of Clary after Lilith’s apartment exploded, Alec, Isabelle and Jace try to come to terms with what has happened. Glad to have their brother back, Alec and Isabelle are still worried about Jace, who is taking the actions of The Owl very hard. Magnus is also mourning the loss of his magi...

Simon is determined to get rid of the Mark of Cain and, with Isabelle’s help, tries to track down New York’s oldest vampire to get more information on the mark. Now in Paris, Clary desperately tries to find an escape from her current situation. Meanwhile, with his new sense of mortality, Magnus trie...

Beati Bellicosi

Jordan and the Praetor try to track down Heidi, while the Shadowhunters try to locate Jonathan. Meanwhile, Luke looks to Maryse for help and Isabelle gets a possible lead on information on what is really going on in the Clave prisons.

A Kiss from a Rose

Continuing to track down information on the rumors about misconduct at The Clave’s downworlder prison, Isabelle asks Alec for help. Meanwhile, Magnus succumbs to asking Lorenzo for a favor and Jace takes Clary on a special date.

To the Night Children

As the saying goes, “rules are made to be broken.” But what if the rules are there for a reason? Several members of the team must examine the reasoning behind certain rules after consequences to questionable actions come to light. Whether the rules were broken because of love, loyalty or revenge, do...

Clary and Jace come up with a risky plan to get rid of her twinning rune, which may bring an old enemy back into the fray. Meanwhile, Alec is worried about Magnus.

Simon and Izzy team up on a secret mission to figure out what the Clave is hiding. Meanwhile, Clary is conflicted about Jonathan as the Shadowhunters try to get answers.

The Beast Within

A demon outbreak in New York City on Halloween becomes a top priority at the Institute, but as the Shadowhunters hunt the demons, Jace becomes more worried about Clary. Meanwhile, Alec has to juggle the outbreak with his deep concern about Magnus’ depression.

To try and save Clary from Jonathan, Jace goes undercover. Back at the Institute, Isabelle, Simon and Luke race to find a way to finally destroy Clary’s bond with Jonathan. With time running out, can Isabelle create the solution before Jace’s cover is blown?

Alec, Jace and Isabelle make a plan to finally get Clary back and stop Jonathan—much to Luke’s and Simon’s chagrin. Meanwhile, an emotionally raw Magnus struggles to deal with his father’s reappearance and Maia must make a tough decision that could affect the rest of her life.

🎭 Cast of Shadowhunters Season 3

Katherine McNamara

Katherine McNamara

Dominic Sherwood

Dominic Sherwood

Alberto Rosende

Alberto Rosende

Matthew Daddario

Matthew Daddario

Harry Shum Jr.

Anna Hopkins

Emeraude Toubia

Emeraude Toubia

Isaiah Mustafa

Alisha Wainwright

Alisha Wainwright

📋 All Seasons of Shadowhunters

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